630 W. T. LEE STRATIGRAPHY OF COAL FIELDS OF NEW MEXICO 



Mesaverde 

 or younger 



Section of Rocks measured in the Tijeras Goal Field, 'New Mexico 



Feet Inches 



Sandstone, coarse-grained (not continuously ex- 

 posed, thiclvness estimated) 400± . • 



Sandstone, gray, coarse-grained, friable; contains 



fossil leaves Lauriis ? sp 15 



Coal 1 G 



Not exposed 25 



Coal 3± . . 



Not exposed ? 



Sandstone, coarse-grained, hard, cliff-making 



(thickness estimated) 50 



(Abrupt change in lithology) 



Shale and j^ellow sandstone. The shale predomi- 

 nates in the lower part and the sandstone 

 above; contains Ostrea sp. ; Inoceramus hara- 

 J)ini Morton?; Cucullcea sp. ; Cyprimeria sp. ; 

 Legumen ? sp. ; Gyrodes sp. ; VolutomorpJia 

 novimexicana Herrick and Johnson ? ; Fiisus ? 

 sp. ; Odontofusus ? sp. (U. S. G. S. locality No. 

 7187) 390 



Shale, with many thin layers of yellow flaggy 

 sandstone 50 



Sandstone, massive ; contains Ostrea sp. ; Inoce- 

 ramus sp. ; Guculloea sp. ; Gyprimeria sp. ; Volu- 

 tomorpJia sp. ; Pyropsis sp. ; Placenticcras 

 planum Hyatt; Placenticcras sancarloscnse 

 Hyatt; BacuUtes sp. ; Sphcnodisciis 1 sp. ; 

 Lama ? sp. (U. S. G. S. locality No. 7182 and 



7185) 55± . . 



Coal with a thin layer of shale containing 



Ficus sp. above it 1±: . . 



Shale 15 



Coal 2± . . 



Shale, not continuously exposed 15 



Sandstone, massive ; contains Ostrea sp. ; Gucul- 

 loea sp. ; Gucullaza ? sp. ; Gardium sp. ; Gypri- 

 meria sp. ; Mactra sp. ; Gyrodes sp. ; Voluto- 

 morpJia novimexicana Herrick and Johnson; 

 Placenticcras sancarloscnse Hyatt (U. S. G. S. 

 locality No. 7184) 30 



Shale, with Myrica torreyl 1 and other plants. . . 10 



Coal 1 8 



Shale and sandstone, with thin layers of coal ; 



contains GuculJwa sp. and Gardium sp 20 



Coal 2± 



Sandstone, massive, cliff-making: contains Gar- 

 dium, sp. ; GaUista ? sp. ; VolutomorpJia sp. 

 (U. S. G. S. locality No. 7186) 115 



Mesaverde 



